Study of Phase-Shift Laser Ranging on Travelling Crane Anti-collision System

摘要

Combining the research situation of travelling crane anti-collision system, this paper presents a way of phase-shift laser ranging using sine amplitude modulation to solve the measurement precision deficiency of travelling crane anti-collision system. In order to enhance the precision of measuring result, system uses independent inner and external optical receiving circuit, eliminating the additional phase shift caused by receiving circuit time delay.